# Top 10 common mistakes when writing your own will
Disclaimer: This article is for informational purposes only and does not constitute legal advice. Estate planning laws vary by state. Consult a licensed estate planning attorney in your jurisdiction before drafting or executing any legal documents.
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A will fails for the same handful of reasons, over and over. Not because people are careless, but because a will looks like a simple document — fill in some names, sign at the bottom, done — when it's actually a legal instrument with precise statutory requirements that vary by state and that most people encounter exactly once in their lives, with no chance to fix mistakes after the fact.
Market estimates suggest only about a third of American adults have any estate planning documents at all, so a self-drafted will is almost always better than nothing. The problems show up when people treat it as a form-filling exercise. Here are the ten mistakes that cause the most damage, roughly in order of how often they invalidate or complicate an estate.
This is the single most common reason a will gets thrown out. Every state has formal execution requirements, and courts apply them literally. In most states, the testator must:
About half the states also recognize holographic wills — entirely handwritten, signed documents — but the rules aren't uniform. California allows them without witnesses. New York generally doesn't recognize them. A person who read about holographic wills online and assumed the rule was national is a recurring pattern in probate disputes.
The fix: look up your specific state's execution statute before signing anything. State legislature websites publish this for free, and it takes ten minutes to confirm.
Even a perfectly executed will runs into trouble if one of the two witnesses is also inheriting under it. Most states have "interested witness" statutes that void the gift to that witness, or in some cases open the whole will to challenge, even though the document itself was signed correctly.
The scenario plays out constantly: a parent asks their adult child — who is also the primary heir — to witness the will because they're standing right there. That one decision can cost the child their inheritance.
The fix: use two witnesses who receive nothing under the will. Neighbors, coworkers, friends with no financial stake — anyone with no skin in the outcome.
A will only controls the probate estate. A large share of most people's net worth passes by beneficiary designation or survivorship, completely outside the will:
| Asset type | Controlled by will? | Controlled by |
|---|---|---|
| Life insurance proceeds | No | Beneficiary designation |
| 401(k) / IRA accounts | No | Beneficiary designation |
| Joint tenancy property | No | Right of survivorship |
| Payable-on-death accounts | No | POD designation |
| Trust assets | No | Trust document |
| Solely owned real estate | Yes | Will / probate |
| Personal property | Yes | Will / probate |
Industry data suggests Americans hold well into the trillions of dollars in life insurance face value, the bulk of which will go to whoever is named on the policy — not whoever is named in the will. If that beneficiary designation still says "ex-husband" or "my late mother," a beautifully drafted will changes nothing.
The fix: audit every account and policy you own, and update beneficiary designations at the same time you draft or revise the will. Treat it as one task, not two.
Probate fights often start with a sentence as innocent as "I leave my jewelry to my daughters equally." Which jewelry? All of it, including the ring you'd verbally promised your oldest daughter three years ago? Equal in value, or equal in item count?
Contested estates routinely burn tens of thousands of dollars in legal fees — sometimes far more, depending on estate size — money that comes directly out of what you meant to leave behind. I've seen "divide the furniture equally" alone turn into a six-month standoff between siblings who otherwise got along fine.
The fix: be specific to the point of tedium. Describe items by make, model, location, approximate value. For sentimental items, attach a personal property memorandum — legally recognized in many states — listing specific items and recipients.
If both parents die without a guardian named in a valid will, a judge who has never met your children decides who raises them. Relatives can and do compete for custody, which turns grief into litigation.
This matters most for single parents, who may be the child's only surviving parent, but it applies to any household with minor children.
The fix: name a primary guardian and a backup. Have the conversation with them before you name them in the document — don't let them find out from a probate filing. And decide separately whether the guardian should also control the money, or whether a different trustee makes more sense; the two roles don't have to go to the same person.
A will is a photograph of your intentions on the day you signed it. Life moves faster than most people's estate plans. Review it after:
A particularly common trap: a will drafted before marriage. Many states give a new spouse statutory rights to a share of the estate regardless of what an old will says, and the clash between those rights and the outdated document is exactly the kind of thing that ends up in court.
The fix: review every three to five years as a floor, and immediately after any of the events above. A calendar reminder is not overkill here.
If you have a revocable living trust, assets properly titled in it bypass probate — the will has no authority over them. Trying to redirect trust assets through the will doesn't override the trust; it just creates a document that contradicts itself.
The fix: keep the trust, the "pour-over" will, and beneficiary designations aligned, ideally reviewed by the same attorney at the same time.
The executor locates the will, files it with probate, notifies creditors, pays debts, and distributes what's left. If your named executor has died, can't serve, or simply says no — and there's no named alternate — the court appoints an administrator who has no idea who you were or what you wanted.
The fix: name a primary and at least one successor executor. For a complex estate, consider a corporate executor (bank trust department or professional fiduciary) as primary or backup.
Once a will is properly signed and witnessed, crossing out a name or scribbling a change in the margin doesn't just fail to make the change — it can call the validity of the entire original document into question.
The correct way to amend a will is a codicil, a separate document meeting the same execution formalities, or by revoking the old will and executing a new one entirely.
The fix: don't touch a signed will with a pen. A short attorney consultation, often a few hundred dollars, is one of the few places in this list where spending money is unambiguously cheaper than the alternative.
A will that exists but can't be located at death is, functionally, no will. Most states require the original document — a photocopy doesn't count. Safe deposit boxes create their own headache: many banks won't release one after death without a court order, which costs time and money at the worst possible moment.
The fix: store the original somewhere accessible — a fireproof home safe, with your attorney, or a state will registry if your state offers one. Tell your executor exactly where it is. A copy with your attorney plus a note in your personal records is a reasonable backup.
For a single person with modest assets, no minor children, and a simple beneficiary structure, a DIY platform can produce an adequate will for under $200. The trouble is that these tools generate documents that look complete and sometimes aren't — a review of online will services found they can miss state-specific witnessing or notarization requirements, and none of them can flag blended-family complications, estate tax exposure, or asset protection issues, because they don't know to ask.
The rough industry guidance: if your estate is worth more than $500,000, you have minor children, you own a business, you've been divorced, or you own property in more than one state, hire an attorney. Comprehensive wills and basic estate plans typically run $500–$2,500 depending on complexity and location — a small fraction of what a contested or invalid will can cost your heirs.
Can a will be handwritten without witnesses?
In roughly half the states, a holographic will — entirely handwritten and signed — is valid without witnesses. California, Texas, and Virginia recognize them; New York, Florida, and Georgia generally don't. Check your specific state before relying on one.
What happens if I die without a will?
You die "intestate," and state law decides who inherits — which may look nothing like what you'd have chosen. Most states default to spouse and children first, then other relatives. Unmarried partners, close friends, and stepchildren who were never legally adopted typically get nothing.
Can I disinherit a spouse or child?
Adult children can generally be disinherited if the intent is clear. Spouses are harder — most states grant a surviving spouse an "elective share" (often around a third of the estate) that a will alone can't waive away. Minor children generally can't be fully disinherited, since courts can still impose support obligations.
Does a will avoid probate?
No — filing with and being validated by probate court is the entire point of having a will. Only trust assets, beneficiary-designated accounts, and joint tenancy property skip probate. If avoiding probate is the goal, that's a living trust conversation, not a will conversation.
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One thing to do today: pull up your current will, or admit you don't have one, and check it against your state's execution requirements, which are published free on your state legislature's website. Confirm it's signed, witnessed by two non-beneficiaries, and stored somewhere your executor actually knows about. If there's no will yet, that's a phone call to an estate attorney, not a project for someday.